Problem rendering a mask.

In advance, I apologize for this, very likely, more than simple question. I've looked on-line for answers, but I lack the vocabulary and experience for the program to effectively research the issue. If this question has been answered previously, please feel free to forward me to the appropriate link.

Here's my issue. I've made two masks (The Planet and its reflection). They look ok on my preview window, but, when I render the "Dimensional Portal 2", I lose the remaining video (i.e. the room goes black). How can I render so I get everything in it?

"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.

Thanks. I had no intention to make "Dimensions 2" a Guide Layer. Must have accidentally clicked on that somehow. I don't even know what the purpose of a Guide Layer is.... Anyway, you nailed it. Thanks for taking the frustration out of it. Not gonna lie that I feel a little silly that it was such an quick fix though.